Contacting Tandem: Phone, Customer Service, and Complete Information (2026) Key Facts

• Customer service phone: 8778016901
• Service hours: Monday-Friday, 9am-6pm
• Languages: French, English, Spanish
• Contact methods: Phone, Email, Mobile App, Live Chat

About Contacting Tandem: Phone, Customer Service, and Complete Information (2026)

Contacting Tandem: Phone, Customer Service, and Complete Information (2026)

Are you looking to contact Tandem to get information about your accounts, green loans, or savings products? This reference page published on annuaire.services provides all the information you need to reach the customer service of this pioneering British green finance neobank. Whether you want to get the Tandem phone number, send an email, or use the mobile app to chat with an advisor, we detail every available communication channel, hours, pricing, features, and much more below. Tandem stands out as the UK's first green digital bank, and its contact model relies primarily on its mobile app and digital channels. Discover below a comprehensive guide to everything you need to know about this innovative financial institution.

Tandem is a neobank founded in 2014 in London, now based in Blackpool, which has established itself as a major player in sustainable finance in the UK. With over 500 employees spread across Blackpool, Cardiff, Durham, and London, Tandem offers competitive savings accounts (up to 5.25% AER), green loans for home improvement, car financing, and mortgage products. All of its services are accessible through its mobile app, available on iOS and Android. If you need to contact Tandem by phone, please note that the bank favors contact via its app, although a dedicated savings number exists: 0203 370 0970. Here is the most comprehensive guide available on this British green bank.

1. Background and History of Tandem: The Genesis of the UK's First Green Digital Bank

Tandem was founded in 2014 by Ricky Knox, Matt Cooper, and Michael Kent, three visionary entrepreneurs who shared the conviction that the traditional banking system needed to evolve to better serve consumers and the planet. The founding idea was simple yet bold: to create a fully digital bank, with no physical branches, capable of helping customers manage their money more intelligently while contributing to a more sustainable future. From its inception, Tandem positioned itself as a "challenger bank," one of those alternative banks shaking up the historical giants of British finance like Barclays, HSBC, or Lloyds.

Tandem's early years were marked by considerable challenges. In December 2016, the bank announced it had secured a £35 million investment from Chinese conglomerate Sanpower, which also owned the House of Fraser department store. However, £29 million of this investment was withdrawn in March 2017, as the Chinese government tightened restrictions on outbound investments. This loss of funding forced Tandem to voluntarily surrender its banking license, although the company retained all of its other regulatory authorizations. This was a critical moment that could have meant the end of the adventure for many startups, but Tandem's founders demonstrated remarkable resilience.

The decisive turning point came in August 2017, when Tandem announced the complete acquisition of Harrods Bank, a prestigious banking institution founded in 1893 and operating from the famous Harrods department store in Knightsbridge, London. This acquisition, finalized on January 11, 2018, brought Tandem a loan portfolio of nearly £200 million, over £300 million in deposits, and approximately £80 million in capital. Most importantly, it gave Tandem the banking license it needed to operate fully. Harrods Bank, which traditionally served a high-net-worth (HNW) clientele, was transformed and integrated into Tandem's digital model.

In March 2018, Tandem continued its growth-by-acquisition strategy by purchasing Pariti Technologies Limited, the developer of the Pariti financial management app. This acquisition strengthened Tandem's technological capabilities and its expertise in account aggregation and expense tracking. The year 2020 marked a major strategic pivot toward environmental sustainability with the acquisition of Allium Lending Group in August, a specialist in green home improvement loans. This acquisition enabled Tandem to offer loans specifically dedicated to solar panels, heat pumps, insulation, and other energy-efficient home improvements.

Under the leadership of Ricky Knox, who remained CEO until July 2021, Tandem gradually evolved from a simple financial management app into a full-fledged green digital bank. In February 2021, Tandem acquired the mortgage portfolio of Bank and Clients, adding approximately 300 customers and £100 million in assets. The year 2022 was particularly transformative with the acquisition of consumer lender Oplo in January, creating a combined business exceeding £1.2 billion in total assets. This merger considerably strengthened Tandem's lending capacity and expanded its customer base.

In April 2023, Tandem acquired the money-sharing app Loop Money. Paul Pester, one of Loop's co-founders and former CEO of TSB, was then serving as chairman of Tandem's board of directors. In November 2022, the bank launched its new "Tandem Marketplace," a platform providing information and resources to promote a more environmentally friendly lifestyle. Today, Tandem employs over 500 people across four UK offices, with its main headquarters located in the Blackpool Airport Enterprise Zone, a site partially powered by solar energy.

Tandem's financial trajectory is also remarkable. After years of losses inherent to any startup in a growth phase, the bank achieved its first profit, following the trend of British neobanks finally reaching profitability. More recently, Tandem reported a 40% growth in profits, with underlying profit reaching £24.1 million, confirming the viability of its business model centered on savings and green lending. To contact Tandem customer service and learn more about the bank's history, you can use the mobile app directly, which is the institution's preferred communication channel. In-app contact remains the most efficient way to reach an advisor.

Tandem has also formed a strategic partnership with Cogo, a fintech specializing in carbon management, to integrate a carbon footprint tracking tool directly into its banking app. This collaboration enables customers to measure, understand, and reduce their CO₂ emissions linked to their financial spending. Tandem's "Green Gap Index" highlights consumers' persistent desire to reduce their carbon footprint, contrasted with a lack of awareness and understanding of their environmental impact. This unique positioning makes Tandem not just a bank, but a true partner in its customers' individual ecological transition.

2. Tandem's Offerings and Pricing: A Range Specialized in Savings and Green Loans

Tandem stands out from other neobanks through its highly targeted positioning. Unlike Monzo, Revolut, or Starling, which offer current accounts with debit cards for everyday spending, Tandem focuses exclusively on two pillars: savings and green lending. This strategic choice allows it to offer some of the most competitive rates on the UK market. If you wish to obtain detailed information about Tandem pricing, in-app contact is recommended for personalized advice.

Savings Accounts

Tandem offers several types of savings accounts, all managed through its mobile app and protected by the FSCS (Financial Services Compensation Scheme):

• Instant Access Saver: This account offers a variable rate of 4.35% AER, with a "top-up rate" that can bring the yield to 3.40% or more depending on current conditions. Funds are accessible 24/7, with no withdrawal penalty. There is no minimum deposit required, and no fees are charged. This account is ideal for building a rainy-day fund while benefiting from a higher return than traditional banks.
• Fixed Term Saver: This account offers guaranteed rates of up to 5.25% AER, depending on the chosen lock-in period (from 6 months to several years). Once the account is opened, the customer has a 14-day window to fund it, after which the funds are locked until maturity. This product is recommended for savers who do not need to access their money in the short term and want to maximize their return.
• Cash ISA (Tax-free Individual Savings Account): Tandem also offers fixed-rate Cash ISAs, allowing UK customers to save up to £20,000 per tax year (2025/2026) in complete exemption from tax on interest. The rates offered are among the most attractive on the market, rivaling those of the best online banks. ISA transfers from other providers are possible, although some customers have reported delays during the transfer process.
• Instant Access Cash ISA: For those who want to combine flexibility with tax advantages, this instant-access ISA offers a competitive return with the ability to withdraw funds at any time.

All Tandem savings accounts are free — there are no monthly management fees, no opening or closing fees. The bank earns revenue by using a portion of deposits to fund its lending activities, particularly its green home improvement loans. This "greener lending" model is what enables Tandem to offer such competitive rates while maintaining its environmental commitment.

Green Home Improvement Loans

The second pillar of Tandem's offering concerns green loans, specifically designed to finance energy-efficient home improvements. These unsecured loans can reach £50,000 and cover a wide range of projects:

• Installation of photovoltaic solar panels
• Heat pumps (air-to-air, air-to-water, geothermal)
• Thermal insulation (walls, roof, floor, double/triple glazing)
• High energy efficiency boilers (ErP "A" rating)
• Mechanical ventilation systems (MVHR)
• Electric vehicle charging points
• Home energy storage batteries

For a loan to be considered "green" by Tandem, it must demonstrate an environmental impact above the UK national average in terms of emissions or energy efficiency. For example, a loan for a property rated EPC C or better (the UK average being EPC D) can qualify as a green loan. Tandem has surpassed £650 million in approved loans for green and "pathway to green" home improvement. If you have questions about a project's eligibility, you can contact Tandem via the app for a personalized assessment.

Car Finance and Mortgages

Beyond savings and green loans, Tandem also offers car finance (motor finance) and mortgage products, the latter being distributed through a partnership with Fiducia. Tandem's mortgage offering was strengthened by the acquisition of the Bank and Clients portfolio in 2021, and the integration of Oplo's portfolio in 2022 considerably expanded the bank's consumer lending capabilities.

It is important to note that Tandem does not offer a current account, debit card, credit card, or daily banking services such as international transfers or currency exchange. The bank is designed as a "satellite" bank, complementary to a main current account held at a traditional bank or another neobank. For any questions about Tandem offerings and pricing conditions, the recommended channel is in-app contact, where advisors can guide you to the product best suited to your needs.

3. Tandem App Features: An Interface Centered on Savings and Environmental Impact

The Tandem app, available on iOS (App Store) and Android (Google Play), is the heart of the banking experience offered by the institution. Describing itself as "a financial lifestyle app designed to help you live a little greener, while saving your hard-earned money," the Tandem app stands out with its unique sustainability-oriented features. The Tandem mobile phone is the primary tool for managing accounts and interacting with the bank: in-app contact remains the priority communication mode.

Savings Management

The app allows you to manage all Tandem savings products intuitively. Customers can open new accounts, make transfers, check balances, and track their interest accrual in real time. The interface is clean and user-friendly, designed to make savings management accessible to everyone, including those less familiar with digital financial tools. The Confirmation of Payee (CoP) system is integrated to secure fund transfers to Tandem accounts.

Carbon Footprint Tracking

Perhaps the most distinctive feature of the Tandem app is its carbon footprint tracking tool, developed in partnership with fintech Cogo. This feature allows users to visualize the environmental impact of their spending, understand which consumption categories generate the most CO₂ emissions, and receive personalized recommendations for reducing their footprint. Tandem's Green Gap Index feeds this feature with research data on sustainable consumption behaviors.

Energy Performance Certificate (EPC)

Another remarkable feature is the ability to check the Energy Performance Certificate (EPC) of your home directly in the app. By simply entering your address, you can obtain a detailed report on your home's energy consumption, accompanied by specific recommendations for improving energy efficiency. This feature is closely linked to Tandem's green loan offering: if the recommendations suggest installing solar panels or a heat pump, the customer can directly apply for a green loan through the app.

Green Hub

The Green Hub is a dedicated section of the app that centralizes information, advice, and resources to help customers adopt a more sustainable lifestyle. It features educational articles on energy efficiency, potential savings calculators linked to home improvements, and links to the Tandem Marketplace, the platform launched in November 2022 that connects customers with green solution providers.

Loan Management

For customers who have taken out a green loan, car finance, or mortgage product, the app offers a comprehensive loan management dashboard. Customers can check their remaining balance, repayment history, payment schedule, and even make early repayments. Push notifications keep customers informed of upcoming due dates and important changes affecting their products.

App Security

The app integrates robust security features, including biometric authentication (fingerprint, facial recognition), a dedicated PIN code, and end-to-end data encryption. In case of suspected data compromise or loss of phone, customers can request immediate blocking of their savings account to prevent any unauthorized transfers. This request can be made via in-app contact, by emailing hello@tandem.co.uk, or by calling the savings support team directly.

Savings Impact

A feature unique to Tandem is the visualization of the positive impact of your savings. The app concretely shows how depositors' savings are used to fund green projects: solar panels installed, tonnes of CO₂ avoided, homes improved. This transparency reinforces customer engagement and gives concrete meaning to the act of saving. If you want to learn more about the app's features, the Tandem customer service phone is accessible through the app itself.

4. Additional Services from Tandem: Beyond Savings and Lending

While Tandem primarily focuses on savings and green lending, the bank has gradually expanded its range of services to offer a more complete experience to its customers. Here are the main additional services available, which you can explore in detail using in-app contact.

Tandem Marketplace (Green Marketplace)

Launched in November 2022, the Tandem Marketplace is a platform integrated into the app that connects customers with verified green solution providers. Whether you're looking for a solar panel installer, a heat pump supplier, a specialist insulation contractor, or an electric vehicle dealer, the Marketplace offers options tailored to your location and needs. This service is a natural extension of Tandem's green loan offering, creating a complete ecosystem from financing to the execution of energy improvement projects.

Motor Finance (Car Credit)

Tandem offers car financing solutions, with a particular emphasis on low-emission vehicles. This service was strengthened by the acquisition of Oplo in 2022, which brought significant expertise in consumer lending and car finance. Customers can obtain a financing simulation and submit their car finance application directly through the Tandem app or website. The motor finance service is part of the range of Tandem services accessible through the bank's digital channels.

Mortgage Products

In partnership with Fiducia, Tandem offers mortgage products for property purchase or remortgaging. This service is primarily aimed at UK residents and covers a variety of situations: first-time buyers, homeowners looking to refinance, property investors (buy-to-let). Tandem mortgages incorporate a green dimension when the financed property has good energy performance (EPC C or better), aligning with the bank's overall mission to promote a more sustainable housing stock.

Green Home Improvement Loans via Partners

Beyond its own green loans, Tandem works with a network of approved partners and brokers to distribute its home improvement financing products. These partners include solar panel installers, energy renovation companies, and specialized financing brokers. This indirect distribution model allows Tandem to reach a broader customer base and offer its financing solutions at the very moment the customer is planning their renovation work.

Educational Tools and Resources

Tandem invests significantly in the financial and environmental education of its customers. Through its app and website, the bank offers detailed savings guides, yield calculators, blog articles on green finance, and reports like the Green Gap Index that illuminate sustainable consumption trends. These resources are freely accessible and constitute an important value-added service for both current and potential Tandem customers. To access these resources or ask questions, in-app contact is the most direct means.

ISA Transfer

Tandem facilitates ISA (Individual Savings Account) transfers from other providers. Customers can initiate a transfer directly from the app, with Tandem handling coordination with the original bank. This service allows savers to consolidate their ISAs at Tandem to benefit from its competitive rates while retaining the associated tax advantage. Note however that transfer times can vary depending on the responsiveness of the original bank, and some customers have reported waits of several weeks.

5. Security at Tandem: Regulation, Deposit Protection, and Cybersecurity

Tandem security is a crucial topic for any potential or current customer of this neobank. As with any financial institution, trust rests on a solid regulatory framework, deposit protection mechanisms, and rigorous cybersecurity practices. Tandem meets each of these criteria with a high level of compliance.

FCA and PRA Regulation

Tandem Bank Limited is authorized by the Prudential Regulation Authority (PRA) and regulated by the Financial Conduct Authority (FCA), the two main financial regulators in the UK. This dual level of supervision ensures that Tandem complies with the strictest standards in risk management, fair treatment of customers, pricing transparency, and financial soundness. Tandem's FCA registration number is publicly available on the official FCA register (register.fca.org.uk), providing independent verification of its regulatory status.

FSCS Protection

All savings deposits at Tandem are protected by the Financial Services Compensation Scheme (FSCS), the UK's deposit guarantee scheme. This protection covers eligible deposits up to £85,000 per person (some sources mention up to £120,000 depending on specific conditions and temporary high balances). In the event of Tandem's failure, the FSCS would step in to reimburse eligible depositors, generally within 7 working days. It is important to note that this protection applies per banking institution, not per account: if a customer holds multiple accounts at Tandem, the protection cap applies to the total of their deposits at the institution.

Encryption and Data Protection

Tandem uses state-of-the-art encryption to protect customers' personal and financial data. All data is encrypted in transit (TLS/SSL) and at rest. The mobile app integrates strong authentication mechanisms, including biometric verification (fingerprint, facial recognition) and one-time security codes. The bank complies with the UK General Data Protection Regulation (GDPR) and PCI DSS standards for payment data processing.

Anti-Fraud Policy

Tandem maintains a strict fraud prevention policy. The bank explicitly states that it will NEVER contact its customers unsolicited by email, phone, post, or any other means to request personal or confidential information such as account numbers, PIN codes, or online banking credentials. This policy is clearly communicated on the bank's website and in the app, sensitizing customers to phishing and social engineering risks. In case of doubt about a suspicious contact, the official Tandem phone number for savings (0203 370 0970) can be used to verify the authenticity of a communication.

Emergency Account Blocking

In case of suspected data compromise or loss of phone, Tandem customers can request immediate blocking of their savings account. This blocking prevents any outgoing fund transfers, thus protecting the customer's savings even if a third party has obtained unauthorized access. The blocking request can be made via in-app contact, by emailing hello@tandem.co.uk, or by calling the savings support team. Tandem recommends that its customers report any suspicious activity immediately, never share their login credentials, destroy documents containing personally identifiable information, and always properly log out of the app on shared devices.

Compliance with UK Banking Standards

As a UK-licensed bank, Tandem is subject to strict requirements regarding regulatory capital, liquidity, operational risk management, and reporting. The bank publishes audited annual reports detailing its financial health, regulatory compliance, and performance. The 40% growth in underlying profits, reaching £24.1 million, is testament to a financially sound and well-managed institution. For any questions regarding the security of your accounts, the Tandem customer service phone remains available through the mobile app.

6. Tandem Customer Service: Contact Channels, Hours, and Support Quality

The Tandem phone customer service is a topic that deserves particular attention, as Tandem adopts a distinct approach from traditional banks when it comes to customer support. As a fully digital neobank, Tandem favors digital communication channels, with the mobile app as the primary point of contact. Here is a detailed guide to all available means of reaching Tandem's customer service.

Contact via the Mobile App (Primary Channel)

Tandem's preferred communication channel is in-app contact. From the mobile app, customers can access an integrated messaging feature (in-app chat) allowing them to converse directly with Tandem advisors. This channel is available for questions relating to savings, loans, app technical issues, and general inquiries. The advantage of in-app contact is traceability: all conversations are archived and accessible, making it easier to follow up on complex requests requiring multiple exchanges. This is the recommended way to reach Tandem quickly and efficiently.

Phone

Although Tandem is a digital bank, a dedicated savings phone number is available: 0203 370 0970. This number allows customers to directly contact the savings support team for questions relating to savings accounts, ISAs, fund transfers, and account closure requests. It is important to note that this is not a free number (it is a London 020 number, charged at the local rate for calls from the UK). For those looking for a Tandem toll-free number, it should be noted that Tandem does not currently offer a freephone number dedicated to general customer service. However, calls from a mobile plan including unlimited national calls generally do not incur additional charges. The Tandem non-premium number 0203 370 0970 is charged at the standard local call rate.

Email

Tandem offers several email addresses depending on the nature of the request:

• hello@tandem.co.uk: For general questions relating to savings and banking services
• complaints@tandem.co.uk: For formal complaints, handled in accordance with FCA guidelines
• android-feedback@tandem.co.uk: For feedback and technical issues related to the Android app
• solutions-team@tandem.co.uk: For specific requests requiring the solutions team's intervention

Social Media

Tandem is present on several social media platforms, which can also serve as informal contact channels:

• Instagram: @tandembank
• TikTok: @tandembank
• Facebook: facebook.com/TandemBank
• X (Twitter): @tandem_bank
• LinkedIn: linkedin.com/company/tandem-bank

FAQ and Self-Service Support

Tandem's website (tandem.co.uk/support) offers a comprehensive support section with FAQs organized by categories: General FAQs, Cash ISA FAQs, App FAQs, Mortgage FAQs, Car Finance FAQs, Personal Loan FAQs, Home Loan FAQs, and Green Hub FAQs. These resources allow many customers to find answers to their questions without needing to contact customer service directly. For more complex requests, the Tandem customer service phone or in-app contact are recommended.

Complaints

In case of dissatisfaction, customers can submit a formal complaint by email to complaints@tandem.co.uk. All complaints are handled in accordance with FCA guidelines and timelines. If the customer is not satisfied with Tandem's response, they can escalate the complaint to the Financial Ombudsman Service (FOS), the independent body for resolving financial disputes in the UK. Tandem is committed to handling each complaint fairly and transparently, in compliance with the FCA's Consumer Duty requirements. For urgent complaints, in-app contact generally provides a faster response than email.

Service Hours

Although Tandem does not explicitly publish its customer service hours, the app is accessible 24/7 for account management and FAQ consultation. Human support via in-app chat and phone is generally available during UK business hours (Monday to Friday, approximately 9am to 5pm GMT). Requests submitted outside these hours are handled on the next business day. For emergencies (suspected fraud, lost phone), it is recommended to send an immediate email to hello@tandem.co.uk noting the urgency of the situation, in addition to reporting via the app.

If you are looking for a Tandem business phone or a dedicated professional number, please note that Tandem does not currently offer services specifically intended for businesses or professionals. The bank focuses exclusively on individuals for its savings and loan products. For business inquiries or partnership requests, contact can be established via LinkedIn or the general email address.

7. Customer Reviews of Tandem: Feedback and Trustpilot Ratings

The Tandem customer reviews available on major review platforms offer a nuanced overview of the user experience. With approximately 4,696 reviews on Trustpilot at the time of writing this article, Tandem enjoys a generally positive reputation, although certain aspects attract recurring criticism. Here is a detailed analysis of customer feedback.

Frequently Mentioned Positive Points

Satisfied Tandem customers regularly highlight several qualities:

• Competitive interest rates: Many reviews praise the savings rates offered by Tandem, often among the highest on the UK market for instant-access and fixed-term accounts. Savers particularly appreciate the fixed-rate Cash ISAs, which offer a higher return than most competitors.
• Responsive and personalized customer service: A significant number of Trustpilot reviews highlight the quality of Tandem's customer service. Customers mention advisors who are "incredibly helpful, patient, and professional." Advisor names like Heather, George, or Alex frequently appear in positive reviews, demonstrating a personalized service where customers feel heard and individually supported.
• Simple and fast process: Account opening, fund deposits, and savings management via the app are described as "quick, efficient, and stress-free" by many customers. The simplicity of the interface is particularly appreciated by those less comfortable with technology.
• Environmental mission: Tandem's commitment to sustainability is praised by many customers who are sensitive to environmental issues. Knowing that their savings contribute to financing green projects gives additional meaning to the act of saving.
• Proactive problem resolution: When issues arise, customers note that Tandem generally takes the initiative to resolve them, sometimes even contacting the original bank directly during ISA transfers to accelerate the process.

Recurring Negative Points and Criticisms

Like any financial institution, Tandem receives criticism from some customers:

• ISA transfer delays: This is the most frequent subject of complaint. Several customers have reported excessive delays when transferring their ISAs to Tandem, some waiting several weeks or even over a month. One customer mentions opening an ISA on December 29, 2025 and requesting a transfer on January 1, 2026, only to find "almost 3 weeks later, absolutely nothing." This issue seems, however, more related to inter-bank processes than to Tandem itself.
• No current account: Some prospects or customers regret that Tandem does not offer a current account, forcing them to maintain an account at another bank for their daily operations.
• Rate changes: A few customers complain about rate decreases on instant-access accounts, which is however inherent to the variable nature of these products and common across the entire banking sector.
• Identity verification process: Some new customers have reported difficulties during the identity verification (KYC) process required at account opening, citing repeated document requests or issues with ID recognition.

Overall Rating and Positioning

On Trustpilot, reviews are "mostly very positive," with a large majority of customers describing an "excellent experience." Tandem's overall rating is in the high range, which is remarkable for a neobank. The most frequent qualifier in reviews is "helpful," followed by "quick" and "professional." Tandem is recognized by Bank.Green as one of the most sustainable banks in the UK, and this recognition by an independent body reinforces the credibility of its environmental commitment. To read the latest reviews or share your own experience, you can also contact Tandem via the app for information about review channels.

The Smart Money People platform, specializing in UK financial reviews, has also awarded Tandem the title of "Best app-based savings provider," a distinction that confirms the quality of the user experience. The Tandem reviews converge on the fact that the bank excels in its niche — competitively priced savings and green lending — even though it does not aspire to be a universal bank.

8. Comparison of Tandem with Competitors: Starling Bank, Monzo, and OakNorth

To better understand Tandem's positioning in the UK neobank landscape, it is essential to compare it with three major competitors: Starling Bank, Monzo, and OakNorth. Each of these banks adopts a different strategy, and the Tandem comparison with these players reveals distinct strengths and weaknesses. If you are hesitating between several banks and would like personalized advice, Tandem's in-app contact will allow you to obtain additional information about its specific advantages.

Tandem vs Starling Bank

Starling Bank, founded the same year as Tandem, has followed a diametrically opposite trajectory by positioning itself as a universal digital bank. Starling offers a complete current account with a Mastercard debit card, "Spaces" (savings spaces), banking services for businesses and self-employed workers, as well as a Banking-as-a-Service (BaaS) platform. Where Tandem excels is in savings rates: with rates up to 5.25% AER fixed, Tandem far surpasses Starling, whose savings rates are significantly lower. On the other hand, Starling offers a complete everyday banking experience that Tandem cannot provide. The ideal combination for a UK customer looking to maximize their savings while having a high-performing current account would be to use Starling as their main bank and Tandem as a satellite savings bank.

Tandem vs Monzo

Monzo is arguably the best-known neobank in the UK, with its famous coral-colored card and millions of customers. Monzo excels in everyday banking with innovative features like savings "Pots," real-time expense tracking, split payments, and premium subscriptions (Monzo Plus, Monzo Premium). However, when it comes to pure savings, Tandem offers significantly higher rates. Monzo's savings "Pots," while convenient for budget management, offer lower returns than Tandem's dedicated accounts. Furthermore, Tandem's environmental commitment is incomparably deeper than Monzo's, which has not made sustainability a central pillar of its identity. For green-minded savers, Tandem remains the obvious choice over Monzo.

Tandem vs OakNorth

OakNorth is often described as "the most profitable UK neobank nobody talks about." Founded in 2013 "by entrepreneurs for entrepreneurs," OakNorth specializes in mid-sized commercial loans (£500,000 to £45 million), a segment largely neglected by traditional banks. Its proprietary technology platform ACORN (AI-powered credit intelligence) is globally recognized and licensed to other financial institutions. On the savings side, OakNorth and Tandem compete directly with competitive rates, although Tandem generally has a slight rate advantage. The main difference lies in the target: Tandem caters to environmentally conscious individuals, while OakNorth focuses on entrepreneurs and SMEs. For an individual saver sensitive to environmental issues, Tandem represents the choice most aligned with their values.

Summary Comparison Table

In summary, Tandem is not in direct competition with Starling or Monzo for everyday banking services, but clearly outperforms them on savings rates and environmental commitment. Compared to OakNorth, Tandem stands out through its focus on individuals and green loans. Tandem's ideal positioning is that of a satellite savings bank, complementary to a current account held at another institution. For any additional questions about the differences between Tandem and its competitors, in-app contact remains the best channel for obtaining up-to-date information.

9. Case Studies: Three Concrete Scenarios of Using Tandem

To illustrate concretely the usefulness of Tandem in the daily lives of UK consumers, here are three representative case studies of typical customer profiles. These examples show how Tandem's different products can meet varied needs. If you recognize yourself in one of these profiles, don't hesitate to contact Tandem via the app to explore the options available to you.

Case Study #1: Sarah, 34 — Green Savings and Energy Renovation

Sarah is a marketing professional based in Manchester, owning a Victorian house rated EPC D. Eager to reduce her energy bills and carbon footprint, she is looking to finance the installation of solar panels and an air-to-water heat pump. At the same time, she wants to grow her emergency savings.

Tandem solution adopted:

• Instant Access Saver: Sarah opens an instant-access savings account to deposit her £15,000 emergency fund, benefiting from a 4.35% AER rate while maintaining the flexibility to withdraw her funds at any time.
• Fixed Rate Cash ISA: She transfers her £18,000 ISA from her traditional bank to a Tandem fixed-rate Cash ISA at 5.25% AER over 2 years, maximizing her tax-free return.
• Green Home Improvement Loan: Sarah takes out a £22,000 green loan to finance the installation of solar panels (£8,500), an air-to-water heat pump (£12,000), and improved loft insulation (£1,500).
• Impact tracking: Through the Tandem app, Sarah regularly checks her home's EPC certificate and observes the progressive improvement in her energy rating, moving from D to C after the work.

Result: After one year, Sarah has generated approximately £1,740 in combined interest on her savings and ISA accounts, reduced her annual energy bill by £1,200 thanks to the solar panels and heat pump, and improved her home's EPC rating from D to C, potentially increasing her property's value. The entire process was managed through the Tandem app, from savings deposit to green loan application. Sarah particularly appreciated being able to contact Tandem via the app to track the progress of her loan application.

Case Study #2: James and Priya, 42 and 39 — Maximizing Family Savings

James and Priya are a London couple with two children, holding significant savings of £120,000 spread across several traditional banks offering rates below 2%. They want to optimize the return on these savings without taking market risks.

Tandem solution adopted:

• Laddering strategy: James and Priya spread their savings across several Tandem products to optimize returns while maintaining some liquidity.
• Instant Access Saver (x2): Each opens an instant-access account with £10,000, totaling £20,000, serving as a family emergency fund at 4.35% AER.
• 1-Year Fixed Term Saver: £40,000 locked at a fixed rate of 5.10% AER, generating approximately £2,040 in guaranteed interest over one year.
• Cash ISA (x2): Each uses their £20,000 ISA allowance for the tax year, totaling £40,000 in Tandem fixed-rate Cash ISAs, with interest completely tax-free.
• 2-Year Fixed Term Saver: The remaining £20,000 is placed in a 2-year fixed-term account to take advantage of a favorable rate over a longer period.

Result: By transferring their savings from traditional banks offering less than 2% to Tandem products, James and Priya generate approximately £5,500 in annual interest instead of £2,400, a net gain of over £3,100 per year. Using Cash ISAs also avoids any taxation on a significant portion of this interest. The couple manages all their Tandem accounts through the mobile app and found the opening process quick and smooth. For advice on the laddering strategy suited to their situation, they used in-app contact to chat with a Tandem advisor.

Case Study #3: Tom, 58 — Retirement Preparation and Ethical Investment

Tom is a teacher in Cardiff approaching retirement and wants to invest his savings securely while ensuring his money contributes positively to society. Environmentally conscious for decades, he is looking for a bank that shares his environmental values and offers solid returns without market risk.

Tandem solution adopted:

• Laddered Fixed Term Saver: Tom spreads £80,000 across four fixed-term accounts of different durations (6 months, 1 year, 18 months, 2 years), creating a "savings ladder" that progressively releases funds while maximizing overall returns.
• Annual Cash ISA: Each year, Tom uses his £20,000 ISA allowance to open a new Tandem Cash ISA, accumulating over the years a portfolio of ISAs at successive fixed rates.
• Environmental impact tracking: Through the Tandem app, Tom regularly consults impact reports showing how his deposits contribute to financing green projects. He knows his savings have helped finance solar panel installations, low-emission vehicle purchases, and home insulation across the UK.
• Green Hub: Tom also uses Tandem's Green Hub to learn about energy improvements he could make to his own home before retirement, with a view to reducing his future fixed costs.

Result: Over five years of using Tandem, Tom has accumulated over £22,000 in interest on his savings, a significant portion of which is tax-free thanks to ISAs. He has also improved the energy efficiency of his Cardiff home through a £15,000 green loan financing the installation of double glazing and loft insulation. Tom describes Tandem as "the only bank where my money works for me AND for the planet." To track the evolution of his various accounts and receive alerts when his fixed-term accounts come up for renewal, Tom uses the Tandem app daily. When he needed help with a complex ISA transfer, he used the Tandem customer service phone for direct telephone assistance.

10. Expansion and Outlook for Tandem: Toward Green Finance Accessible to All

Tandem's future looks promising, driven by favorable macroeconomic and societal trends. The British green bank is well positioned to capitalize on the growing demand for sustainable financial products, the intensification of public policies for energy transition, and the maturation of the neobank market. Here are the main expansion and development prospects for Tandem. To stay informed about the bank's latest news, don't hesitate to contact Tandem via the app and enable app notifications.

Financial Growth and Sustainable Profitability

Tandem's financial trajectory is decidedly upward. With 40% growth in underlying profits reaching £24.1 million, the bank has proven the viability of its business model. This profitability rests on a solid net interest margin model, where savers' deposits fund loans at higher rates, the difference constituting the bank's revenue. Tandem's specialization in green home improvement loans, a segment with a relatively low default rate, helps maintain a controlled risk profile. Medium-term growth prospects include increasing the depositor base, expanding the green loan portfolio, and continuously improving operational efficiency through complete process digitalization.

Expanding the Green Loan Offering

Tandem plans to broaden its green loan offering beyond home improvement. The electric vehicle market, booming in the UK thanks to government incentives and the progressive ban on new combustion engine vehicles, represents a major opportunity for Tandem. Similarly, financing emerging technologies like home energy storage batteries, rainwater harvesting systems, or green roofs could enrich the green loan catalog. The milestone of £650 million in approved green loans is just the beginning: Tandem aims to become the UK's leading green lender by volume.

Technology and Innovation

On the technology front, Tandem continues to invest in improving its mobile app and digital tools. The partnership with Cogo for carbon footprint tracking is only the first step in a broader strategy aimed at integrating AI and data analytics tools to offer increasingly personalized financial and environmental recommendations. The 2023 acquisition of Loop Money also suggests an interest in money-sharing and community financial management features, which could be integrated into a future version of the app. The bank is investing in automated energy assessment technologies that could accelerate the green loan approval process by using satellite data and AI models to estimate building energy performance.

Favorable Regulatory Environment

The UK regulatory framework is evolving in a direction favorable to Tandem. The British government's Net Zero strategy, targeting carbon neutrality by 2050, generates growing demand for green financial products. The FCA's new ESG (Environmental, Social, Governance) reporting requirements and Consumer Duty encourage financial institutions to develop products that truly serve the interests of customers and society. Tandem, whose mission has been aligned with these objectives since its founding, finds itself in an advantageous position compared to traditional banks that must undergo cultural and operational transformation to adapt to these new requirements. Government grants for energy-efficient home improvements, such as the Boiler Upgrade Scheme, also create complementary demand for Tandem's green loans.

International Expansion Potential

Although Tandem is currently an exclusively British bank, the green digital bank model is potentially exportable to other European markets facing similar energy transition challenges. Germany, France, the Netherlands, or Scandinavian countries, with their strong environmental awareness and mature financial markets, could constitute medium- to long-term expansion targets. However, such expansion would require obtaining local or European banking licenses, considerable investment in regulatory compliance, and product adaptation to the specifics of each market. For now, Tandem is focused on consolidating its position in the UK and deepening its domestic offering.

Challenges Ahead

Tandem faces several challenges in the years to come. Competition is intensifying in the online savings market, with new banks and fintech players offering attractive rates. Major traditional banks are also starting to offer green savings products, encroaching on Tandem's historical territory. Furthermore, the interest rate environment, which has been favorable for bank margins in recent years, could turn unfavorable if the Bank of England makes significant cuts to its base rate. Finally, Tandem must continue to innovate to maintain customer engagement and attract new depositors in a market where banking loyalty tends to decline. Maintaining impeccable customer service quality, accessible via in-app contact, will remain a crucial differentiating factor.

Long-Term Vision

Tandem's vision is to become the undisputed leader in green finance in the UK, proving that it is possible to reconcile financial performance with positive environmental impact. Every pound saved at Tandem contributes, through the greener lending mechanism, to financing the energy transition of British homes. With its proven model, established profitability, and clear mission, Tandem is well positioned to play a growing role in the UK's sustainable financial ecosystem and potentially beyond. The bank has been recognized by Bank.Green as one of the most sustainable banks in the UK, and aims to maintain this distinction while pursuing its growth. As Tandem's leadership summed it up: "We're not perfect, but we push to do better every year."

How to Contact Tandem: Complete Summary of All Channels

To conclude this comprehensive guide, here is a summary of all available means to contact Tandem depending on the nature of your request. Whether you're looking for the Tandem phone number, the customer service email address, or the fastest way to reach an advisor, you'll find all the necessary information below.

For savings-related questions

• Phone: 0203 370 0970 (non-premium number, local rate)
• Email: hello@tandem.co.uk
• App: Integrated chat in the Tandem app (in-app contact recommended)

For complaints

• Email: complaints@tandem.co.uk
• Escalation: Financial Ombudsman Service if Tandem's response is not satisfactory

For app technical issues

• Android email: android-feedback@tandem.co.uk
• Solutions email: solutions-team@tandem.co.uk

For emergencies (suspected fraud, lost phone)

• Priority: Immediately contact hello@tandem.co.uk with "URGENT" in the subject line
• Phone: 0203 370 0970 during business hours
• App: Request immediate account blocking via in-app chat

To follow Tandem on social media

• Instagram: @tandembank
• TikTok: @tandembank
• Facebook: facebook.com/TandemBank
• X (Twitter): @tandem_bank
• LinkedIn: linkedin.com/company/tandem-bank

The Tandem customer service phone is not the only way to reach the bank, but it remains a valuable option for those who prefer a voice conversation. For routine tasks (account opening, balance checking, interest tracking), in-app contact is the fastest and most convenient channel. Tandem continues to improve its communication channels to offer an optimal customer experience, in line with its mission of making green banking accessible and user-friendly for everyone.

Whether you are a seasoned saver looking for the best rates, a homeowner wanting to finance energy improvements, or simply a curious consumer discovering how your money can contribute to a more sustainable future, Tandem offers a unique proposition on the UK market. The Tandem phone number (0203 370 0970), email (hello@tandem.co.uk), and mobile app are at your disposal to answer all your questions. Don't hesitate to use in-app contact to start your journey with this pioneering green neobank.

Frequently Asked Questions About Tandem and Its Contact Details

To answer the most common questions from internet users looking for information about this British neobank, here is a series of Q&As covering the main aspects of Tandem's customer service and contact details.

What is Tandem's phone number for customer service? The main Tandem phone number available is 0203 370 0970, dedicated to savings support. This Tandem phone number is charged at the local call rate from the UK. For customers looking for a Tandem toll-free number, there is currently no dedicated freephone number, but in-app contact is completely free. The Tandem phone number is accessible during UK business hours.

How to contact Tandem by phone in an emergency? If you need the Tandem emergency number, use 0203 370 0970 during business hours or send an urgent email to hello@tandem.co.uk. The Tandem emergency phone is the same as the main savings support number. For a Tandem emergency call outside business hours, in-app contact with an "urgent" mention is the best option. The Tandem emergency phone is available for critical situations such as suspected fraud or loss of the phone associated with the account. If you need to block a Tandem card, note that Tandem does not offer a bank card; however, for an emergency card block by phone, savings account blocking can be requested immediately via the app or by phone.

Is there a Tandem business number? Regarding the Tandem business phone, the bank does not currently offer dedicated services for professionals. The Tandem business number therefore does not exist as such. The Tandem business number and Tandem business phone are not differentiated from the main number. If you are a professional looking for the Tandem business phone, the same number 0203 370 0970 can be used. For the Tandem business phone and Tandem business number, contact hello@tandem.co.uk for specific requests.

What is the Tandem phone number for customer service? The main Tandem phone is 0203 370 0970. For the Tandem customer service phone, this number is the main telephone entry point. The Tandem customer service phone is complemented by in-app chat for immediate assistance. The Tandem customer service phone is available on weekdays during business hours.

What Tandem phone numbers are available? The main Tandem phone number is 0203 370 0970 for savings. The Tandem phone number includes only one public number dedicated to savings customer support. The official Tandem phone number is verified on the tandem.co.uk/contact/savings website. The Tandem phone number is a London number (020 area code), and a Tandem toll-free number is not available as the bank does not have a dedicated freephone line.

How to reach Tandem by phone or email? To reach Tandem by phone, dial 0203 370 0970 from the UK. The Tandem phone is accessible for savings questions. The Tandem customer service phone is complemented by the email address hello@tandem.co.uk. The Tandem phone remains an important channel despite the bank's preference for digital. For the Tandem customer service phone, advisors are trained to answer questions about all the bank's savings products.

What is Tandem's non-premium number? The Tandem non-premium number is 0203 370 0970. This number is charged at the standard local rate and is not a premium-rate number. For subscribers with a plan including national calls, this call is generally included at no extra charge.

Additional General Information About Tandem

For those seeking comprehensive Tandem information, this section summarizes the essential data about the British green neobank. The Tandem address of its headquarters is located at Blackpool Airport Enterprise Zone, England. The official Tandem website is accessible at tandem.co.uk, where you'll find all information about the bank's products and services.

Regarding Tandem hours, the bank operates online 24/7 via its app, while human support is available during UK business hours. Tandem branches do not exist as such, as Tandem is a 100% digital bank with no network of physical branches. The Tandem headquarters in Blackpool is not open to the public for banking operations.

The Tandem app is the central point of the customer experience. It is available for free download on the App Store (iOS) and Google Play Store (Android). The Tandem customer area in the app allows you to manage all savings products, view loans, and contact customer service. For opening a Tandem account, the process is done entirely online via the app, with digital identity verification (KYC). The Tandem online bank offers a fully paperless experience, from account opening to daily savings management.

Tandem products include instant-access savings accounts, fixed-term accounts, Cash ISAs, green home improvement loans, car finance, and mortgages. The Tandem rate on savings accounts ranges from 3.40% AER (instant access with top-up) to 5.25% AER (fixed term / Cash ISA). The Tandem limit for ISAs is £20,000 per tax year (in accordance with HMRC regulations). Tandem fees are non-existent for savings accounts: no management, opening, or closing fees.

The Tandem card is no longer offered — Tandem stopped offering credit cards to focus on savings and green loans. Blocking a Tandem card is therefore not applicable under the current offering. For blocking a Tandem card, the same principle applies: Tandem no longer offers cards. However, blocking a Tandem account in case of emergency remains possible via in-app contact or by phone.

Tandem loans stand out for their ecological orientation. The Tandem credit for home improvement can reach £50,000 and covers a wide range of energy-efficient projects. Tandem insurance is not offered directly by the bank, but partners may offer complementary insurance products through the Tandem Marketplace. Tandem transfers are made by standard bank transfer from a current account, with Confirmation of Payee (CoP) verification.

For regulatory aspects, Tandem regulation is overseen by the FCA and PRA. Tandem FSCS protects eligible deposits up to £85,000 per person. The Tandem banking license was acquired through the purchase of Harrods Bank in 2018, after the temporary loss of the original license in 2017. The Tandem SWIFT code and Tandem BIC code are available for incoming international transfers by contacting the bank directly.

Tandem referral may be available through the app — check current offers directly in the app. Closing a Tandem account can be done by contacting the savings support team at 0203 370 0970 or via the app. Tandem ISA transfer is possible from other providers and is managed directly through the app, although timelines may vary.

The overall Tandem review from customers is positive, as evidenced by the thousands of reviews on Trustpilot. The Tandem rating on this platform reflects a satisfactory customer experience for the vast majority of users, with strengths in customer service and savings rates. Tandem alternatives on the UK market include Starling Bank (for a complete current account), Monzo (for an innovative everyday banking experience), OakNorth (for fixed-term savings), and Chase UK (for savings with cashback). However, none of these alternatives offers the same level of environmental commitment as Tandem.

Ultimately, Tandem represents a unique option on the UK banking market for savers wishing to combine financial returns with positive environmental impact. Whether you're looking to contact Tandem to open an account, get information about rates, or report a problem, the communication channels are clearly defined and accessible. The Tandem customer service stands out for its responsiveness and professionalism, whether via phone (0203 370 0970), email (hello@tandem.co.uk), or in-app contact. Don't hesitate to explore Tandem's offering and contribute, through your savings, to building a greener, more sustainable future.

Sources and References

• Tandem Bank official website: tandem.co.uk
• Wikipedia — Tandem Money: en.wikipedia.org/wiki/Tandem_Money
• FCA Register — Tandem Bank Limited: register.fca.org.uk
• Trustpilot — Tandem Bank Reviews: trustpilot.com/review/tandem.co.uk
• Bank Advisor — Tandem Bank Review 2026: bankadvisor.co.uk/tandem
• The Independent — UK's 'green' digital bank makes first profit: independent.co.uk
• Financial IT — Tandem Posts 40% Profit Growth: financialit.net
• Fintech Global — Cogo and Tandem Bank enhance app: fintech.global
• FFNews — Tandem Bank acquires green lending business: ffnews.com
• Good With Money — Top-paying UK ethical savings accounts 2026: good-with-money.com
• Google Play Store — Tandem Bank App: play.google.com
• Tandem Bank — Greener Lending Explained: tandem.co.uk/save/green-lending
• Tandem Bank — Support: tandem.co.uk/support
• Tandem Bank — Contact Savings: tandem.co.uk/contact/savings
• Sifted — Ricky Knox departs Tandem: sifted.eu
• Blackpool EZ — Tandem Bank changing the future of banking: blackpoolez.com

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